Mechanical refrigeration



Oct. 23, 1928.

C. C. SPREEN MECHANICAL REFRIGERATION Filed Jan. 29, 1927.

Charles C. Sprccn Inventor jj/womou Attorneis Patented Oct. 23, 1928;

CHARLES c. srnnnn, 01,,DETROIT, MICHIGAN.

MECHANICAL REFRIGERATION.

Application filed January 29, 1927. Serial No. 164,428

My invention relates to mechanical refrigeration, and particularly to refrigerant expansion apparatus especially designed for domestic mechanical refrigerating units, and

the principal objcctof my invention is to provide new and improved apparatus of this type. In the drawings accompanying this specification and forming a part of this application I have shown, for purposes of illustration, one form which my invention may assume, and in these drawings:

Figure 1 is a front elevation showing the embodiment of while r Figure 2 is a section on the line 2-2 of Figure 1. The embodiment of my invention shown herein comprises a refrigerator cabinet 11 having a refrigerating compartment 12 housing a sectional refrigerant expansion apparatus 13 consisting'of a plurality of 'units 14, only two being shown, each unit consisting of a. refrigerant expansion con'ipart-n'ient 15 having the form of a spiral tube. Each turn of the spiral 15 carries a multiplicity of perforated circular disks 16 forming fins for increasing heat transfer; and the several spirals are connected together in spaced relation by supporting means in the form of a plurality of brackets 17 depending from the top wall 1.8 of the compartment 12, attached thereto by screws 19, and directly engaging my invention disclosed herein,

the refrigerant expansion compartments 1!);

The edges of the fins 16 of adjacent units 14 adapted for the reception of ice trays 21.

One end of the top unit 14 is connected by an extension22 of the spiral tube 15 to the refrigerant inlet-valve 23 of the refrigerating system, the other end of this top unit 14 is connected by a. connection 24 with one- At the same time it will be obvious to those skllled in the art that the embodiment of the lnvention herein shown and described may be variously changed and modified Without departing from the spirit of my invention or sacrificing the advantages thereof, and it thereforewill be'understood that the disclosure herein is illustrative only, and that my invention is not limited thereto.

I claim:

-1. Refrigerant expansion apparatus com-.

prising: aplurality of refrigerant expansion units formed substantially identical, and

each 'comprising a refrigerant expansion engage and support sleeve-like receptacles 20 compartment, having the fornr of a spiral tube; separate fin means carried bythe sepn larate turns of each of said spiral tubes; 1(0' tray receptacles supportcd' by said fin means; a framework connecting said spiral tubes i-nto a single refrigerant expansion unit; and means connecting said spiral tubes into a single refrigerant expansion chamber.

2. Refrigerant expansion apparatus comprising; a. plurality of refrigerant expansion units formed substantially identical, andeach comprising a refrigerant expansion compartment, havlng the form of a spiral tube; separate fin means carried by the separate turns .of each of said spiral tubes; ice tray receptacles supported by said fin means; a framework directly connecting-and supporting said spiral tubes into a single refrigerant expansion unit; and means connecting said spiral tubes into a single refrigerant expansion chan'lber. i

3. Refrigerant expansion apparatus comprising: a plurality of refrigerant expansion units formed substantially identical. and each comprising a refrigerant expansion compartlnent. having the form of spiral tubes, separate (111 means carried by the separate turns of each of said spiral tubes; lee tray receptacles 'su :)ported by said fin means and in' thermal cont-act therewith; a framework connceting said spiral tubes into a single refrigerant expansion unit; and conduits connecting said spiral tubes into a single refrigerant expansion chamber.

In testimony whereof I hereunto affix my signature.

CHARLES o. .SPRJEEN'.

IOU 

